<!DOCTYPE html>
<link rel='match' href='position_relative_stacking_context_contents_ref.html'>
<style>
html, body {
    margin: 0;
}
aside {
    display: block;
    position: relative;
    left: 12px;
    z-index: 3;  /* force creation of stacking context */
    background: red;
}
div {
    float: left;
    width: 100px;
    height: 100px;
    background: blue;
}
</style>
<aside><div></div></aside>

